Cutting-bar for mowing-machines.



No. 635,32l. Patemd oct. 24, |899 v.1. B. mu..

CUTTING BAR FUR MOWING MACHINES.

(Application led my l, 1899.)

(No Modal.)

UNITED STATES PATENT @Erica JOHN B. HILL, OF WINOHESTER, CANADA.

CUTTING-BAR FOR IVIOWING-IVIACHINES.

SPECIFICATION forming part of Letters Patent No. 635,321, dated October 24,. 1899. Application filed May 1, 18979. Serial No. 715,109. (No model.)

To all whom it may concern,.-

Beit known that I, JOHN B. HILL, a subject of I-Ier Majesty the Queen of Great Britain, residing at Winchester, county of Dundas, Province of Ontario, Canada, have invented certain new and useful Improvements in Cutting-Bars for MoWing-Machines; and I do hereby declare that the following is a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

This invention relates to cutter-bars for mowing and reaping machines; and its object is to provide a cutter-bar for such machines which is simple in construction, of more than ordinary strength, effective in operation, and can be manufactured at a low cost.

A further object is to provide an improved means for securing the removable cutterknives to the cutter-bar which is simple in construction, effective in use, and whereby the said cutter-knives may be easily and quickly secured to the cutter-bar and removed therefrom when it becomes necessary to sharpen or replace the said knives.

To these ends the invention consists in an improved cutter-bar and means for removably securing the cutter-knives thereto, substantially as hereinafter illustrated, and described and defined in the appended claim.

Referring to the drawings, in which similar letters of reference refer to similar parts, Figure l illustrates in perspective the improved cutter-bar with the knives in operative position. Fig. 2 is a View in perspective of a fragment of the cutter-bar with one of the cutter-knives detached, showing the details of construction whereby the knife is removably secured in position. Fig. 3 is a section taken on the line 3 3 of Fig. l.

In the drawings, A represents a fragment of the cutter-bar of a mowing-machine, which cutter-bar may be of any ordinary or preferred form. The upper surface is provided with a series of transverse `recesses a, the edges a' of which are undercut, as shown in Fig. 2. The front edge of the cutter-bar is also cutaway along its entire length, forming undercut recesses a2, extending on each side of the slot o. Each edge a' of the recesses a is provided `with inclined perforations c3, the said perforations extending down into the cutter-bar.

The cutter-knives B are of any ordinary or preferred construction and are provided with the usual shank or tang h, the edges b' of which are suitably undercut or beveled to correspond with and closely iit the undercut edges a' of the recesses a, formed in the cutter-bar A. The rear edges b2 of the knife B are also undercut or beveled to correspond with the recesses a2, in which they are adapted to fit. A semicircular groove b3 is formed on each of the edges Z1 of the shank b and so located as to be in alinement with the perforations a3, formed in the cutter-bar A.

The locking rod or bar D is formed of any suitable material and is slightly bowed or curved at its central portion d, and the ends d of said bar D are bent downwardly at an angle to permit them to enter the inclined perforations c3 of the cutter-bar A, as shown in Fig. 3. .Y

The parts are assembled by slipping the shank of the knife into the recess formed in the cutter-bar until the rear edges of the knife fit closely with the recesses a2 and the grooves b3 are in alinement with the perforations a3. The locking-bar D is then applied and its ends driven into the perforations as. It will thus be seen that I have provided a strong, simple, and effective means for locking the knives to the cutter-bar without diminishing the strength of said bar by boring rivet-holes therethrough, as in the ordinary construction. The knives may be readily removed by inserting the end of a cold-chisel or other suitable tool beneath the locking-rod and prying the same out of the perforations in the cutter-bar.

While I have herein shown a preferred form of carrying my invention into effect, yet I do not desire to limit myself to such preferred details of construction, but claim the right to use any and all modifications thereof which Awill serve to carry into effect the objects to be attained by this invention in so far as such modifications and changes may fall within the spirit and scope of my said invention.

I clairn- Y The combination with a cutter-bar provided with a recess having undercut side edges and inclined perforations formed in said side ICQ edges, of n. knife having :L shank adapted to recess and shank whereby said knife is rero be removably mounted in said recess, beveled movabiy secured to the' cutter-ber, substanedges formed upon the rear of said knife and tiaily as described. the sides of said shank, corresponding with In Witness whereof I have hereunto set my 5 the undercut; edges of said recess, lche edges hand in the presence of two Witnesses.

of the said shank being provided with grooves JOHN B. HILL, corresponding with the perforations of said XVitnesses: recess, and n lockingber adapted to be driven S. S. REVELER,

into the perforations and grooves of lshe said A. W. BROCH. 

